#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
int main()
{
	int i = 0;
	int ret = 1;
	int n = 0;
	int sum = 0;
	for (n = 1; n <= 3; n++)
	{
		ret = 1;
		for (i = 1; i <= n; i++)
		{
			ret = i * ret;
			

		}
		sum = ret + sum;
		
	}
	 printf("%d", sum);
	return 0;
}